1642354851 has 16 divisors (see below), whose sum is σ = 2306124800. Its totient is φ = 1036797408.

The previous prime is 1642354849. The next prime is 1642354871. The reversal of 1642354851 is 1584532461.

It is not a de Polignac number, because 1642354851 - 2¹ = 1642354849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642354801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149685 + ... + 160281.

It is an arithmetic number, because the mean of its divisors is an integer number (144132800).

Almost surely, 2^1642354851 is an apocalyptic number.

1642354851 is a deficient number, since it is larger than the sum of its proper divisors (663769949).

1642354851 is a wasteful number, since it uses less digits than its factorization.

1642354851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13338.

The product of its digits is 115200, while the sum is 39.

The square root of 1642354851 is about 40525.9774835845. The cubic root of 1642354851 is about 1179.8378717690.

The spelling of 1642354851 in words is "one billion, six hundred forty-two million, three hundred fifty-four thousand, eight hundred fifty-one".